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(J. NORLING. MEANS FOR SECURING TARPAULINS AND SIMILAR COVERINGS UPONSHIPS HATCHES.

APPLICATION FILED FEB. II. I9I9.

Patented Oct. 21, I919.

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APPLICATION FILED FEB. II. 19!!)- THE cowmnm PLANOGRAPH um, wAsumuToN,n. c.

MEANS FOR SECURING TARPAULINS AND SIMILAR COVERINGS UPON SHIPS HATCHES.

UNITED STATES PATENT oFFioE. h

OSCAR NOR/LING; OF GOTTENBORG, SWEDEN.

MEANS FOR SECURING TARPAULINS AND SIMILAR GOVERINGS UPON SHIPS HATCHES.

lowing is a specification.

This invention relates to means, mainly adapted to be used for securingtarpaulins upon ships hatches to render them waterproof in the ordinaryway and also to be employed generally in such cases, where a tarpaulinor other similar covering is to be closed up tightly by applying anevenly distributed pressure. The invention comprises a plurality ofmembers adapted to be pressed perpendicularly or nearly perpendicularlyagainst and to be withdrawn from the hatch coaming in connection withwhich they are intended to be used. The invention is'characterizedmainly therein, that the clamping members are mechanically operated in aslidable or rotary manner, so thatwhen being moved toward the hatchcoaming, they are caused to be rotated before the displace- 'ment sothat the several pressure-surfaces move in such direction, that theyintersect the displacing direction, and furthermore when being withdrawnfrom the coamlng,

they are caused first to be displaced to a certain degree and thenrotated, so that the pressure surfaces are removed out of tlle'CllS-placing d1rect1on.

The invention may as mentioned above be extensively employed for sundrysecuring purposes, but in the following statement it will beparticularly described as a means of securing 'tarpaulins for shipshatches. When securing such tarpaulins by hand or by means of mechanicaldevices, such as are commonly employed for this purpose, the tarpaulin,by the forcing of the pressing devices against it, is liable to be tornand de stroyed. This trouble is avoided by the present invention, onaccountthereof that the pressing devices are provided in such a manner.Moreover, according to this invention, all the clamping members,arranged along the same side of the hatclrcoaming, are united by meansof a common operating device, and thus they are operated simultaneously,hence a considerable saving of Specification of Letters Patent.

Patented Oct. 21, 1919.

Application filed February 11, 1919. Serial No. 276,299.

board of ships for the purpose mentioned above. Figure 1 shows a planview of a hatch coaming provlded w th a securing device according tothis invention, applied all around it. Fig; 2 shows a side elevation ofthe hatch coaming. Fig. 3a plan view on a larger scale of a clampingmember, attached to the hatch coaming. Fig. 4: a front VlGW "of the samedetail with the clamping-1nem ber partly in section along the line A-+Ain Fig. 5. Figs. 5, 6 and 7 showsi'de views of the clamping-member insection along the line B-B in Fig. at in different operating positions.

The clamping device 1 is provided with a cylindrical disk 2,eccentrically fixed upon a shaft l, journaled along the hatch-coaming 3,this shaft being supported by bearings 5, placed at suitableintermediate distances, and as shown in the drawing, each bearing beingattached close to a clamping-member. The eccentric disk 2 is fitted in aU-shaped member of a guiding block 6 reciprocable in a direction atright angles to the shaft 4, which block is provided with an oblong hole19, extending parallel to the reciprocating direction of the guidingblock, the said shaft 4 passing through the hole 19. All the guidingblocks on the same side of the hatch coaining are secured to an ironbatten-bar 7, extending along the entire side of the hatch coaming,which iron-bar should properly be slightly bent outward opposite to eachclamping-member, as shown in Fig. 1. With this arrangement the battenbars 7 may be pressed closely against the hatchcoam ing along the wholelength of the same, and the intersp'ace betweentwo clampingmembers maybe lengthened and thus the number of me mbers'be decreased.The'eccentric 2 is provided with a pin 8 proj ecting vided in one sideof the U-shaped portion of the guiding-block 6 forming right angles withthe shaft 4, said grooves being curved in a suitable manner and ended bylevels 10 and 11 on each side. of the shaft 4, a little below thehorizontal level through the center-line of the shaft. hen the pin 8 onaccount of the rotation of the eccentric 2 in the same direction as thehands of a clock, see Figs. 5-7, has reached the end level 11 ofthegroove 9, it carries with it the guiding block 6 in the rotary movementwhen continued and thus serves as a conveyer. The rotation of theguiding block 6 in the direction from the hatch-coaming (see the arrowin'Fig. 7) is limited by a pin 12, provided on thebearing-bracket 5 andprojecting from its side, and thus the-rotation of the eccentric 2 inthis direction will'also be stoipped.

11 the shafts 4, 4 4", and 4 provided around the hatch are at thecorners of the hatch-coaming joined by means of bevelgears 13. One ofthe shafts in the drawing, 4, is provided with a wormwheel 14, meshingwith a worm 16, operated by means of a crank 15.

The device operates in the following manner:

Supposing the system to be in the position, shown by Fig. 5, thetarpaulin 17 has been pulled down between tlie'hatch coaming 3 and thebatten-bar 7, which' together with the guiding block 6 is in itswithdrawn position. When operating the handle 15 all the shafts 4, 4etc., are rotated to the left (according to Fig. 5) and at the same timethe guiding blocks 6, projecting over the eccentrics 2, together withthe batten-bars 7 are turned and after that moved toward the tarpaulin13, which thereby is clamped against the hatch-coaming 3 (see Fig. 6).

The tarpaulin is loosened by rotating the shafts 4, 4, &c., to the rightfrom the position shown in Fig. 6, so that the parts first return to theposition, shown in Fig. 5, when the pin 8 of the eccentric 2 touches thebottom level of the groove 9*. By the continued rotation of the shaft tothe right, the

guiding blocks 6 and the batten-bars 7 are carried along with the shaft,until all these parts occupy the positions, shown in Fig. 7, when thecontinued rotation of the guiding blocks 6 to the right is stopped bythe pin 12. Now the tarpaulin may easily be withdrawn.

The tarpaulin having again been spread over the hatch, the shafts 4, 4,&c., with the .against the hatch-coaming in the marmer end level 11 ofthe groove 9 By the continued rotation of the eccentrics 2 the guidingblocks 6 with the batten bars 7 are moved toward the tarpaulin and pressit described above. When the hatch is to be sealed for instance by thecustom-house oilicers in order to prevent undue opening of the same, itis sufiicient merely to seal the crank 15 or to secure in any adequatemanner the worm-gear 14, 16..

r 'I do not want to limit myself to theembodiment described above andillustrated in the drawing, but the details may be varied within thescope of the invention.

By reason of the fact that the grooves 9 and 9* are both located; in theguiding block 6, and the eccentric always touches the block 6 on twodiametrically opposite sides (see Fig. 2) the block will be positivelyrectilinearly displaced by means of the eccentric 2, .slnce as soon asthe eccentric 1s revolved and .go beyond the last mentioned groove butprecisely into the same.

Having .now particularly described and ascertained the nature of my saidinvention, and in what manner the same is to be performed, I declarethat what I, claim is:

1. A device. of the character described ineluding in combination, .ahatch coaming,

battenbars for coacting therewith, rotatable shafts, arranged in spacedrelation and out wardly of the coaming andcooperative interengagingclamping members secured respectively to the bars and the shafts anddesigned to coact with the bars so that upon rotation of the shafts inone direction the barswill be first swung and subsequently movedlaterally into clamping relation with respect to the covering which isadapted to overlie the coaming and when the shaft is rotated in theopposite direction these clamping members will be first moved laterallyaway from the coaming and subsequently swung into non-clamping positionthereby obviating wear on the hatch cover- 2. A device as claimed inclaim 1 wherein the clamping members each include a reciprocable guidingblock, and an eccentric :working in connection with the guiding blockand actuating it so that when the eccentric rotates in either directionthe guiding block is withdrawn from or pressed against the hatchcoarnlng. 4

3.- .A. device of the character described. in

eluding in combination a hatch, a coaming therefor, shafts rotatablymounted on the sides of the hatch but spaced outwardly therefrom, aplurality of sets of cooperative clamping members each including aneccentric on the shaft a reciprocable guiding block of U shapedconfiguration the eccentric being fitted in the space between thediametrically opposite sides of the block so that the guiding block willalways be in contact with two points of the eccentric during rotation ofthe eccentric.

.4. A device as claimed in claim 3 wherein each guiding block isprovidedwith an oblong hole through whichthe adjacent shaft passes so asto be guided by said shaft when being moved toward or withdrawn from thehatch coaming.

5. A device as claimed in the claim 8, wherein cooperative means isprovided on the eccentric and on the block so that the eccentric afterbeing rotated a certain angle carries the guiding block along with itduring the continued rotary movement.

6. A device as claimed in claim 3 wherein each guiding block is mountedso as to also be capable of rotating and a stationary member forlimiting the rotation of the guiding block with relation to the hatchcoaming.

7. A device as claimed in claim 3 wherein batten bars are provided forclamping a tarpaulin against the hatch coaming, and

V Vmeans for rigidly fastening the bars to the guiding blocks along eachside of the hatch so that the bars will follow the combined movements ofthe guiding blocks.

In testimony whereof I have afliXed my 7 signature in presence of twowitnesses.

OSCAR NORLING.

Witnesses:

GUSTAF GoTH, G. OSCAR OLSSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

